EP0172852A1 - Alliage a base de molybdene resistant a haute temperature. - Google Patents

Alliage a base de molybdene resistant a haute temperature.

Info

Publication number
EP0172852A1
EP0172852A1 EP19850900947 EP85900947A EP0172852A1 EP 0172852 A1 EP0172852 A1 EP 0172852A1 EP 19850900947 EP19850900947 EP 19850900947 EP 85900947 A EP85900947 A EP 85900947A EP 0172852 A1 EP0172852 A1 EP 0172852A1
Authority
EP
European Patent Office
Prior art keywords
molybdenum
alloy
silicon
creep resistance
molybdenum alloy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19850900947
Other languages
German (de)
English (en)
Other versions
EP0172852B1 (fr
Inventor
Ralf Eck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metallwerk Plansee GmbH
Original Assignee
Metallwerk Plansee GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metallwerk Plansee GmbH filed Critical Metallwerk Plansee GmbH
Publication of EP0172852A1 publication Critical patent/EP0172852A1/fr
Application granted granted Critical
Publication of EP0172852B1 publication Critical patent/EP0172852B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum

Definitions

  • the invention relates to a heat-resistant molybdenum alloy and the use thereof.
  • molybdenum Because of its high melting point and high heat resistance, molybdenum is often used for molded parts that are intended to withstand high temperatures. The 'molded parts get their high heat resistance through ' strong mechanical shaping of the molybdenum starting material. A widespread application is that of glass melting electrodes.
  • Glass melting electrodes made of pure molybdenum which, depending on the type of glass, temperatures between approx. 1200 ° C and approx. 2000 ° C and which are also mechanically stressed by the movement of the viscous glass melt, therefore often have an unsatisfactorily short lifespan due to the properties mentioned above.
  • the alloy described above is in no way suitable for glass melting electrodes due to the proportions of nickel, iron, cobalt, copper or vanadium.
  • the metals mentioned would contaminate the glass melt and thus cause highly undesirable color changes.
  • Molybdenum alloys, which could be expected to increase the creep resistance appreciably, are listed in the above-mentioned reference "Metallurgy of the rarer metals, No. 5, Molybdenum", page 94 ff. Silicon is not mentioned as an alloy element.
  • the object of the present invention is now to provide an alloy based on molybdenum which is particularly suitable for the production of articles which have a high creep resistance even at temperatures above 1300 ° C.
  • the alloy should also be suitable for the production of objects which have a high corrosion resistance to glass or ceramic melts, without contaminating the glass or ceramic melts.
  • a molybdenum alloy which fulfills this task consists of " > 0.3 - ⁇ 20% by weight silicon, the rest being molybdenum.
  • Alloying silicon to the molybdenum in the concentration range according to the invention results in values for the creep resistance of this material which far exceed the values of pure molybdenum and all known molybdenum alloys. This result is completely surprising and unpredictable.
  • the preferred proportion of silicon is between 0.5% and 2% by weight. However, even with silicon values of 0.3% by weight, significant improvements in creep behavior compared to pure molybdenum can be seen. Silicon proportions of more than 20% by weight also result in an increase in creep resistance, at the same time the melting point of the alloy decreases however, so much so that molybdenum alloys with over 20% silicon content no longer appear technically interesting for high-temperature applications.
  • the alloy according to the invention is particularly suitable for the production of solid rod-shaped or plate-shaped parts as well as for containers, base plates and supports which operate at high temperatures, in particular in the range from 1300 ° C. to 2000 ° C are used.
  • Such parts are e.g. Thrust plates for sinter boats for nuclear fuels or base plates and internals for high-temperature, high-vacuum and high-temperature protective gas furnaces.
  • the use of the alloy according to the invention is particularly advantageous where, in addition to good creep resistance at high temperatures, good corrosion resistance to glass or ceramic melts is also important and where disruptive contamination of these melts is to be avoided.
  • Examples of such applications are electrodes, linings, wear plates, pipelines, shields, base plates, outlets and deflections for glass and ceramic melting furnaces.
  • the elements titanium, zirconium, hafnium, boron, carbon, aluminum, thorium, chromium, manganese, niobium, tantalum, rhenium and tungsten are - as mentioned at the beginning - known as alloy components to molybdenum and already cause a certain increase in creep resistance compared to pure molybdenum.
  • One or more of these elements can therefore optionally be present in the alloy according to the invention without significantly influencing its outstanding creep resistance.
  • other elements which would deteriorate the creep resistance properties of the alloy per se can be tolerated as additional trace proportions in the alloy according to the invention, unless they would interfere with contact with glass melts.
  • the silicon fraction is always in the range between ⁇ 0.3 - ⁇ 20% by weight of the molybdenum fraction.
  • the alloy according to the invention can be produced both by powder metallurgy and by melt metallurgy by arc melting.
  • the silicon can be introduced both in pure form and in the form of molybdenum silicides.
  • the alloy according to the invention cannot be deformed without cutting, which means that it is not possible to manufacture thin sheets, foils and wires.
  • the application will therefore generally remain restricted to large, solid bodies which have their desired shape in the case of powder metallurgy manufacture by pressing, or in the case of melt metallurgy manufacture by solidification of the alloy melted in the arc or in the electron beam preserved in the mold. If necessary, the shaped objects are still machined. In pu vermetallurgi Fixed production, this machining can take place both before and after the sintering process. In the powder metallurgical manufacture of objects by pressing and sintering under hydrogen or in vacuum, the objects have a residual porosity which can be eliminated if necessary by subsequent hot isostatic pressing.
  • the articles can be produced without their own sintering process by hot isostatic pressing of the pre-pressed bodies.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Ceramic Products (AREA)

Abstract

L'alliage à base de molybdène résistant à haute température contenant à part du molybdène un taux en silicium variant entre 0,3% et 20% en poids, présente une excellente résistance au fluage, ce qui permet son utilisation dans la fabrication d'objets massifs en forme de barres ou de plaques, ainsi que de récipients, de cales d'épaisseur et de supports destinés d'être employés à des températures comprises entre 1300o et 2000oC. D'excellentes qualités de résistance à la corrosion face à du verre et à de la céramique en fonte permettent l'emploi d'un tel alliage à la fabrication d'électrodes et d'autres parties constructives dans les fours de fusion pour le verre et la céramique.
EP19850900947 1984-02-29 1985-02-18 Alliage a base de molybdene resistant a haute temperature Expired EP0172852B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT67184A AT386843B (de) 1984-02-29 1984-02-29 Verwendung einer hitzebestaendigen molybdaen-legierung
AT671/84 1984-02-29

Publications (2)

Publication Number Publication Date
EP0172852A1 true EP0172852A1 (fr) 1986-03-05
EP0172852B1 EP0172852B1 (fr) 1989-02-22

Family

ID=3496751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850900947 Expired EP0172852B1 (fr) 1984-02-29 1985-02-18 Alliage a base de molybdene resistant a haute temperature

Country Status (5)

Country Link
EP (1) EP0172852B1 (fr)
JP (1) JPS61501714A (fr)
AT (1) AT386843B (fr)
DE (1) DE3568351D1 (fr)
WO (1) WO1985003953A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5693156A (en) * 1993-12-21 1997-12-02 United Technologies Corporation Oxidation resistant molybdenum alloy
US5865909A (en) * 1995-07-28 1999-02-02 Iowa State University Research Foundation, Inc. Boron modified molybdenum silicide and products
AT2017U1 (de) * 1997-05-09 1998-03-25 Plansee Ag Verwendung einer molybdän-/wolfram-legierung in bauteilen für glasschmelzen
JP5876943B2 (ja) * 2013-01-16 2016-03-02 国立大学法人東北大学 合金およびその製造方法
DE102015214730A1 (de) 2014-08-28 2016-03-03 MTU Aero Engines AG Kriech- und oxidationsbeständige Molybdän - Superlegierung
EP3309266A1 (fr) 2016-10-13 2018-04-18 MTU Aero Engines GmbH Procédé de fabrication d'un alliage de molybdène à haute teneur en titane
CN107760952B (zh) * 2017-11-08 2018-11-02 西北有色金属研究院 一种Mo-Si-C合金棒材及其制备方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1408491A1 (de) * 1952-10-06 1968-10-10 Sigri Elektrographit Gmbh Verwendung von Legierungen auf der Basis Molybdaen-Silizium fuer Teile hoher Warmfestigkeit und Zunderbestaendigkeit,insbesondere Heizleiter
US3013329A (en) * 1958-06-18 1961-12-19 Westinghouse Electric Corp Alloy and method
SE315668B (fr) * 1964-11-11 1969-10-06 Kanthal Ab
US3720990A (en) * 1969-01-13 1973-03-20 Mallory & Co Inc P R Liquid phase sintered molybdenum base alloys
US3676083A (en) * 1969-01-21 1972-07-11 Sylvania Electric Prod Molybdenum base alloys
JPS5184725A (ja) * 1975-01-23 1976-07-24 Sumitomo Metal Ind Tainetsuseiojusurugokin
JPS51126317A (en) * 1975-04-28 1976-11-04 Fuji Electric Co Ltd Electrode material for electric heating
JPS5754534A (en) * 1980-09-17 1982-04-01 Iseki Agricult Mach Selecting apparatus of threshing machine
JPS59150072A (ja) * 1983-02-10 1984-08-28 Toshiba Corp 高温熱処理用モリブデン治具の製造方法
JPH0617556B2 (ja) * 1983-02-10 1994-03-09 株式会社東芝 モリブデン材の製造方法
JPS59150070A (ja) * 1983-02-10 1984-08-28 Toshiba Corp モリブデン材の製造方法
JPS6026621A (ja) * 1983-07-22 1985-02-09 Toho Kinzoku Kk 耐熱性モリブデン材の製法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8503953A1 *

Also Published As

Publication number Publication date
EP0172852B1 (fr) 1989-02-22
JPS61501714A (ja) 1986-08-14
DE3568351D1 (en) 1989-03-30
WO1985003953A1 (fr) 1985-09-12
ATA67184A (de) 1988-03-15
AT386843B (de) 1988-10-25

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